Reflected Cross-site scripting (XSS) in EQDKP Plus CMS

Project Description

The EQDKP Plus CMS – a tool for managing guilds and raids – lacks input validation in the search function leading to reflected cross-site scripting (XSS) under certain conditions.


Vendor description

“Since 2005, EQdkp Plus is the Tool for managing your Guild and Raids. EQdkp Plus supports a lot of Games, you can easily connect it with your board and it’s a full featured CMS.”

Source: https://eqdkp-plus.eu/

Business recommendation

Update to the latest version of EQdkp Plus. An in-depth security analysis performed by security professionals is highly advised, as the software may be affected from further security issues.

Vulnerability overview/description

Reflected XSS vulnerability

A vulnerability within Search.html allows an unauthenticated attacker to inject a client-side code which will be executed in the browser of users if they visit the manipulated site.

Proof of concept

Reflected XSS vulnerability

This vulnerability can be exploited by an unauthenticated attacker.
The XSS payload is injected in the search function through the ‘s’ parameter using the HTTP POST method.

URL : http:/eqdkp/index.php/Search.html?s=
METHOD : POST
PARAMETER: s
PAYLOAD: "><script>alert(XSS")</script>

Vulnerable / tested versions

EQDKP Plus Core versions 2.3.28 and 2.3.29 have been tested, v2.3.29 was the latest version available at the time of the test.

Vendor contact timeline

2020-04-10Contacting vendor through web contact form (https://forum.eqdkp-plus.eu/wcf/contact/)
2020-05-29Contacting vendor;second time
2020-05-29Vendor agreed to proceed without encrypted channel
2020-06-02Vendor ask to send the details unencrypted to his provided email address.
2020-06-02Reported issue has been fixed and release patch in version 2.3.30
2020-07-01Public release of security advisory

Solution

The fixed version => 2.3.30 of EQdkp Plus at the vendor’s download page: https://download.eqdkp-plus.eu/

Workaround

None

Advisory URL

https://www.sec-consult.com/en/vulnerability-lab/advisories/index.html

EOF Nik Ramadhan Nik Idris, Farhan Rahman / @2020

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Project Details

  • TitleReflected Cross-site scripting (XSS) in EQDKP Plus CMS
  • ProductEQDKP Plus CMS
  • Vulnerable version<= 2.3.29
  • ImpactLow
  • Homepagehttps://eqdkp-plus.eu/
  • Found2020-04-01
  • ByNik Ramadhan Nik Idris (Office Malaysia) | Farhan Rahman (Office Malaysia) | SEC Consult Vulnerability Lab